CONCORD — With a suddenly tight one-run lead and her Amador Valley High softball team reeling from the home run Campolindo’s Sophie McCarthy just hit, it became pitcher Haley Douglas’ job to shut the door and preserve the Dons’ lead.

So she shut the door, locked it and threw away the key.

Douglas came in and retired the next two batters to close out the fifth inning, and she worked a scoreless sixth to give Amador Valley a 5-4 win over Campolindo to advance in the Queen of the Mountain tournament at Willow Pass Park in Concord.

With the win, Amador Valley moves on to play East Bay Athletic League foe Foothill today at 7:15 p.m. Campolindo will also play at 7:15 against Antioch.

Douglas’ impressive relief pitching capped a superb day for the Dons (4-0). Rallies in the first, third and fourth innings kept the pressure on and Amador Valley ahead.

“Every inning we had runners on, some we didn’t convert and others we did,” Amador Valley coach Julie Marshall said. “This team’s got a lot of heart, and they came out swinging.”

Campolindo (1-4) took the field against the Dons in what was actually its second game of the day. The Cougars beat Acalanes in a Diablo Foothill Athletic League game earlier, and it showed at the start as they struggled to mount any offense.

That changed in the fourth inning. A leadoff triple by McCarthy was followed by infield singles by Olivia Hirsch and Rose Fruci. By the time the inning was over, the Cougars trailed 3-2.

After Amador Valley tacked on two more in the bottom of the inning, Jordan Blumberg-Long led off the fifth with a single to center. Amador Valley starter Georgia Bloom struck out the next batter, but McCarthy was next and she drilled a first-pitch fastball over the left fielder’s head for a two-run home run.

“What I told them was they played a very big, very strong team dead even,” Campolindo coach Joe Long said. “A few breaks go a different way, and it would have been a different result.”

Foothill 14, Antioch 3

CONCORD — The defending North Coast Section 3-A champion got its first win of the season in dominating fashion.

It took a while, but once they got the bats going, the Falcons kept scoring. It was scoreless through three innings, before Foothill put up a seven-spot in the fourth inning.

It would add pair of runs in the sixth and five more in the seventh to close it out.

Keri Ball went 3-for-5, with a 3-run homer, a triple and 5 RBIs. Katelyn LaRussa also went 3-for-5 to help the Falcons (1-1) reach the Queen of the Mountain tournament second round.

Granada 10, Arroyo 3

CONCORD — The Matadors erupted for nine runs in the fifth inning to advance to the second round of the Queen of the Mountain Tournament and stay undefeated on the year at 3-0.

Becca Sabatini went 3-for-4 with two RBIs and two runs. Sarah Ragusa also was solid, going 2-for-4.